We'll be fine either way.
He's a young player still and there's value there whether or not he kicks on at Spurs.
If I remember correctly, his preferred position is AM. Not that that matters a lick, but he's only really been utilized for us (on a regular basis) as a RW, and he hasn't been the same since his injury.
Maybe he's lost a step or maybe his tape has been studied, but he slows down play and takes a million unnecessary touches and no gas, he may be the worst first-choice RW in the Premier League. Off the top of my head I can't name another I wouldn't take over him at the moment.
I haven't seen him in person though, so maybe I'm missing something.